Adaptive PCB plate defect visual positioning detection and classification system

Abstract

The invention provides an adaptive PCB plate defect visual positioning detection and classification system. A whole set of processes of PCB detection is covered. The system comprises an offline pre-processing contour point attribute classification stage, online PCB whole plate alignment, defect detection and defect classification. A template matching method is used to align a whole plate, and a speed is fast and precision is high. A contour out-of-tolerance algorithm is used to detect a defect, the precision reaches a sub-pixel level, the speed is fast, and universality is high. Attribute classification is performed on contour points so as to satisfy different tolerances generated because different types of defects match with different detection standards. In the invention, a detection speed and precision of a PCB are increased, detection efficiency is effectively improved, false detection or leak detection conditions of defects are reduced, the automatic detection of PCB surface defects is realized, manpower, material resources and financial resources are reduced, and an production automation degree is increased.

Description

technical field [0001] The invention relates to the technical field of equipment detection, in particular to an adaptive PCB defect visual positioning detection and classification system. Background technique [0002] PCB board is the basic component of all walks of life today, with a wide range of applications. Therefore, the intelligent visual inspection of PCB boards has great market prospects. [0003] The types of defects on PCB boards are complex and diverse, such as open circuits, short circuits, bridging, contamination, etc. And this kind of defective PCB board is strictly prohibited from entering the market, otherwise it will bring incalculable losses to equipment and enterprises. At present, the defects of PCB boards are mainly inspected manually, which is time-consuming, labor-intensive, inefficient and risky. This manual detection method has been difficult to meet the industry requirements. Contents of the invention [0004] Aiming at the deficiencies of th...

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the present invention provides an adaptive PCB board defect visual positioning detection and classification system, the purpose of which is to solve the problems of difficult defect detection, low efficiency and high risk in the PCB industry today, and solve the pain points of the PCB board industry

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